package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.xml.transform.Result;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderService orderService;


    /**
     * 订单
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
//        A. 获得当前用户id, 查询当前用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);
        //购物车的数据
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);
        if (shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空,不能下单");
        }

//        B. 根据当前登录用户id, 查询用户数据
        //用户的数据
        User user = userService.getById(currentId);
//        C. 根据地址ID, 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null){
            throw new CustomException("用户地址信息有误,不能下单");
        }
        long orderId = IdWorker.getId();//获取订单号
        AtomicInteger amount = new AtomicInteger(0);
//        D. 组装订单明细数据, 批量保存订单明细
        ArrayList<OrderDetail> orderDetails = new ArrayList<>();
        for (ShoppingCart shoppingCart : shoppingCarts) {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setDishId(shoppingCart.getDishId());
            orderDetail.setName(shoppingCart.getName());
            orderDetail.setOrderId(orderId);
            orderDetail.setSetmealId(shoppingCart.getSetmealId());
            orderDetail.setDishFlavor(shoppingCart.getDishFlavor());
            orderDetail.setNumber(shoppingCart.getNumber());
            orderDetail.setAmount(shoppingCart.getAmount());
            orderDetail.setImage(shoppingCart.getImage());
            amount.addAndGet(shoppingCart.getAmount().multiply(new BigDecimal(shoppingCart.getNumber())).intValue());
            orderDetails.add(orderDetail);

        }
//        E. 组装订单数据, 批量保存订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(currentId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据,多条数据
        orderDetailService.saveBatch(orderDetails);
//        F. 删除当前用户的购物车列表数据
        shoppingCartService.remove(queryWrapper);

    }

  /*  @Override
    public Result getOnlyOne() {
        QueryWrapper<Orders> wrapper = new QueryWrapper<>();
        wrapper.orderByDesc("order_time");
        Orders newOrder = orderService.getOnly(wrapper);
        return R.success(newOrder);
    }*/


}